| 浆固碎石桩成桩注浆渗透影响分析 |
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| 引用本文： | 温世清,刘汉龙,陈育民.浆固碎石桩成桩注浆渗透影响分析[J].防灾减灾工程学报,2012,32(2):158-163. |
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| 作者姓名： | 温世清 刘汉龙 陈育民 |
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| 作者单位： | 河海大学岩土力学与堤坝工程教育部重点实验室、河海大学土木与交通学院,南京,210098 |
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| 基金项目： | 江苏省自然科学基金创新学者攀登项目 |
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| 摘 要： | 浆固碎石桩作为一种新型软土地基处理技术,其主要通过注浆改善桩体的加固效果,同时通过浆体渗透来改善桩周土体的物理力学性质,从而减小浆固碎石桩复合地基沉降。针对浆体对桩周土体的渗透作用,按照平面轴对称问题,推导出注浆渗透影响范围的计算方法和浆固区压缩模量计算公式,并通过室内模型试验研究,验证了浆固区压缩模量计算公式的正确性。随后,利用数值计算分析,对浆固区影响范围进行量化分析,并通过数值拟合得到了考虑注浆渗透影响的桩体等效半径计算公式。所得结果对工程设计具有重要的指导意义。
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| 关 键 词： | 浆固碎石桩 渗透影响范围 浆固区压缩模量 桩体等效半径 |
Influence of Grout Permeation on Grouted Gravel Pile |
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| WEN Shi-qing
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LIU Han-long
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CHEN Yu-min.Influence of Grout Permeation on Grouted Gravel Pile[J].Journal of Disaster Prevent and Mitigation Eng,2012,32(2):158-163. |
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| Authors: | WEN Shi-qing LIU Han-long CHEN Yu-min |
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| Affiliation: | (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,College of Civil and Transportation Engineering,Hohai University,Nanjing 21098,China) |
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| Abstract: | Grouted gravel pile is a new technique of soft soil improvement.The reinforcement of the pile is realized mainly by the grouting and the improvement of the surround soil induced by the grouting permeation,then settlements of composite foundation can be reduced.Considering the permeation of the grout into clay soil around the grouted gravel pile,the calculation formulas for impacted range of the grout and the modulus of the compression in grouted zone were obtained.The obtained formulas were verified based on model tests.In consideration of the grout permeation,the quantitative analysis of the impacted range by grouting was carried out and the calculation formulas of effectively reinforced soil radius were obtained by numerical analysis,which can give a reference to the engineering design. |
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| Keywords: | grouted gravel pile range impacted by permeation modulus of compression in grouting zone equivalent radius of pile |
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